The patch titled
Subject: kasan: introduce complete_report_info
has been added to the -mm mm-unstable branch. Its filename is
kasan-introduce-complete_report_info.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-introduce-complete_report_info.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: introduce complete_report_info
Date: Mon, 5 Sep 2022 23:05:41 +0200
Introduce a complete_report_info() function that fills in the
first_bad_addr field of kasan_report_info instead of doing it in
kasan_report_*().
This function will be extended in the next patch.
Link: https://lkml.kernel.org/r/8eb1a9bd01f5d31eab4524da54a101b8720b469e.1662411799.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Peter Collingbourne <pcc@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan.h | 5 ++++-
mm/kasan/report.c | 17 +++++++++++++++--
2 files changed, 19 insertions(+), 3 deletions(-)
--- a/mm/kasan/kasan.h~kasan-introduce-complete_report_info
+++ a/mm/kasan/kasan.h
@@ -153,12 +153,15 @@ enum kasan_report_type {
};
struct kasan_report_info {
+ /* Filled in by kasan_report_*(). */
enum kasan_report_type type;
void *access_addr;
- void *first_bad_addr;
size_t access_size;
bool is_write;
unsigned long ip;
+
+ /* Filled in by the common reporting code. */
+ void *first_bad_addr;
};
/* Do not change the struct layout: compiler ABI. */
--- a/mm/kasan/report.c~kasan-introduce-complete_report_info
+++ a/mm/kasan/report.c
@@ -413,6 +413,17 @@ static void print_report(struct kasan_re
}
}
+static void complete_report_info(struct kasan_report_info *info)
+{
+ void *addr = kasan_reset_tag(info->access_addr);
+
+ if (info->type == KASAN_REPORT_ACCESS)
+ info->first_bad_addr = kasan_find_first_bad_addr(
+ info->access_addr, info->access_size);
+ else
+ info->first_bad_addr = addr;
+}
+
void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_type type)
{
unsigned long flags;
@@ -430,11 +441,12 @@ void kasan_report_invalid_free(void *ptr
info.type = type;
info.access_addr = ptr;
- info.first_bad_addr = kasan_reset_tag(ptr);
info.access_size = 0;
info.is_write = false;
info.ip = ip;
+ complete_report_info(&info);
+
print_report(&info);
end_report(&flags, ptr);
@@ -463,11 +475,12 @@ bool kasan_report(unsigned long addr, si
info.type = KASAN_REPORT_ACCESS;
info.access_addr = ptr;
- info.first_bad_addr = kasan_find_first_bad_addr(ptr, size);
info.access_size = size;
info.is_write = is_write;
info.ip = ip;
+ complete_report_info(&info);
+
print_report(&info);
end_report(&irq_flags, ptr);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-check-kasan_no_free_meta-in-__kasan_metadata_size.patch
kasan-rename-kasan_set__info-to-kasan_save__info.patch
kasan-move-is_kmalloc-check-out-of-save_alloc_info.patch
kasan-split-save_alloc_info-implementations.patch
kasan-drop-config_kasan_tags_identify.patch
kasan-introduce-kasan_print_aux_stacks.patch
kasan-introduce-kasan_get_alloc_track.patch
kasan-introduce-kasan_init_object_meta.patch
kasan-clear-metadata-functions-for-tag-based-modes.patch
kasan-move-kasan_get__meta-to-genericc.patch
kasan-introduce-kasan_requires_meta.patch
kasan-introduce-kasan_init_cache_meta.patch
kasan-drop-config_kasan_generic-check-from-kasan_init_cache_meta.patch
kasan-only-define-kasan_metadata_size-for-generic-mode.patch
kasan-only-define-kasan_never_merge-for-generic-mode.patch
kasan-only-define-metadata-offsets-for-generic-mode.patch
kasan-only-define-metadata-structs-for-generic-mode.patch
kasan-only-define-kasan_cache_create-for-generic-mode.patch
kasan-pass-tagged-pointers-to-kasan_save_alloc-free_info.patch
kasan-move-kasan_get_alloc-free_track-definitions.patch
kasan-cosmetic-changes-in-reportc.patch
kasan-use-virt_addr_valid-in-kasan_addr_to_page-slab.patch
kasan-use-kasan_addr_to_slab-in-print_address_description.patch
kasan-make-kasan_addr_to_page-static.patch
kasan-simplify-print_report.patch
kasan-introduce-complete_report_info.patch
kasan-fill-in-cache-and-object-in-complete_report_info.patch
kasan-rework-function-arguments-in-reportc.patch
kasan-introduce-kasan_complete_mode_report_info.patch
kasan-implement-stack-ring-for-tag-based-modes.patch
kasan-support-kasanstacktrace-for-sw_tags.patch
kasan-dynamically-allocate-stack-ring-entries.patch
kasan-better-identify-bug-types-for-tag-based-modes.patch
kasan-add-another-use-after-free-test.patch
kasan-move-tests-to-mm-kasan.patch
